Police officers engaged in probing cyber-related offences believe that the simple process of upgrading the addresses of individuals in the Aadhaar data has emerged as one of the biggest causes of cyber fraud. An Aadhaar card holder can get his or her address changed with the Unique Identification Authority of India (UIDAI), which issues Aadhaar cards, in multiple ways. One of those is to download an address-change certificate from the UIDAI's website and upload it after getting it signed by any of the various public authorities, such as an MP, an MLA, a municipal councillor, a gazetted officer of Group "A" and Group "B" and MBBS doctors, among others.